To find third proportional of any two numbers let say a and b be two numbers and c is in third proportion with a and b

Then,

a : b = b : c

**Third Proportional Example 1**

Find the third proportion to 6 and 12?

**Explanation:**

To find third proportional of any two numbers let say a and b be two numbers and c is in third proportion with a and b

Then,

a : b = b : c

Let, the third proportion to 6 and 12 be a

6 : 12 :: 12 : a

(Product of Extremes= Product of Means)

Here, Extremes are= 6 and a

Means are = 12 and 12

6 x a = 12 x 12

a = = 24

Hence, the value of ‘a’ is 24